Field Validation of Macrotexture-Based Hot Mix Asphalt Segregation Detection Methods

This paper discusses the efforts carried out in the Commonwealth of Virginia to validate the use of macrotexture measurements for identifying and measuring hot-mix asphalt (HMA) segregation as detected by more conventional laboratory procedures. The foundation of this project was a series of field experiments designed to sample the uniformity of typical Virginia Department of Transportation (VDOT) paving mixtures and to test the validity of available equations to predict target macrotexture values. Eight HMA mixes with variable maximum aggregate size and volumetric properties were considered. At each location, the research team conducted dynamic macrotexture measurements and selected the areas to conduct static tests based on those measurements. The static tests included the following: static macrotexture using a circular track meter, density using nuclear and electromagnetic devices, and core extraction and testing. The laboratory tests performed on the cores included: core height (mm), specific gravity, void content, laboratory permeability, asphalt content, and gradation. The researchers demonstrated that macrotexture measurement holds great promise as a tool to detect and quantify segregation for quality-assurance purposes. Correlations of texture with void level/density and asphalt content (traditional measures of segregation) are strong, especially for mixes with moderately-sized aggregates.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/70700638
• Authors:
  • Flintsch, Gerardo W
  • McGhee, Kevin K
  • de Leon, Edgar
• Conference:
  • 2005 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
  • Location: Long Beach CA, United States
  • Date: 2005-3-7 to 2005-3-9
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: CD-ROM; Figures; References; Tables;
• Pagination: pp 1-22
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 74
  • Publisher: Association of Asphalt Paving Technologists (AAPT)
  • ISSN: 0270-2932
  • Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregate segregation; Asphalt content; Bituminous mixtures; Chemical analysis; Core samples; Density; Electromagnetic devices; Field tests; Height; Hot mix asphalt; Laboratory tests; Macrotexture; Measurement; Nuclear density gages; Permeability; Quality assurance; Researchers; Specific gravity; Static tests
• Uncontrolled Terms: Aggregate size; Circular track meter; Extraction (Chemistry); Void content; Volumetric properties
• Geographic Terms: Virginia
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01020747
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Mar 27 2006 11:07AM